What is AOO pacemaker?
In AOO mode, the atrium is paced at a set rate regardless of atrial activity; this is asynchronous atrial pacing. In AAI mode, the atrium is sensed and the pacemaker is inhibited if the native atrial rate rises above the pacemaker set rate; this is demand atrial pacing.
What is VOO mode pacemaker?
Asynchronous modes, VOO or DOO: These are asynchronous pacing modes in which the pulse generator delivers a pacing stimulus at a fixed rate, without any sensing capabilities.
What do you do for an Undersensing pacemaker?
Failure to sense intrinsic beats• If the pacemaker is undersensing (it fires at the wrong times or for the wrong reasons), turn up the sensitivity control. Change the battery or pulse generator. Remove items in the room that might be causing electromechanical interference.
What is the difference between DDD and DDI?
DDD = dual-chamber antibradycardia pacing; if atria fails to fire, it is paced. If the ventricle fails to fire after an atrial event (sensed or paced) the ventricle will be paced. DDI = Like above, but the atrial activity is tracked into the ventricle only when the atria is paced. DOO = asynchronous A+V pacing.
How does DDI mode work?
The DDI mode provides dual-chamber, sequential AV pacing with atrial sensing but no tracking of the sensed atria. AV synchrony is only provided at the current atrial pacing rate (base rate pacing, rate responsive pacing or rate-smoothed pacing).
What is Doo mode?
DOO mode is asynchronous pacing and is usually used only in certain situations, such as when a magnet is placed over a pacemaker or sometimes when a patient is having surgery. R- Rate Response. Rate Response or Rate Adaptive Pacing is used in patients with chronotropic incompetence.
How do you know if your pacemaker is Undersensing?
Ventricular pacing spikes are visible and not only fail to capture the myocardium but show evidence of undersensing: note the inappropriate pacing soon after a QRS complex, after the 3rd beat.
What does Undersensing mean?
Undersensing. Undersensing occurs when the pacemaker fails to detect cardiac activity. This may be due to lead dislodgement, lead fracture or inadequate myocardial contact. It may also be due to the low amplitude (voltage) of the potentials generated by activated myocardium.
What is the difference between a temporary pacemaker and a permanent pacemaker?
Background: Temporary pacemakers (TP) allow short-term ventricular pacing but can be unstable and become ineffective during extended use. Semi-permanent pacemakers (SPP) are active fixation leads connected to an externalized pacemaker generator and may provide a more stable pacing platform.